Performance Evaluation of Voltage Ripple-Based Passive Islanding Detection Method for a Single-Phase Utility-Connected Micro-Grid System

Abstract

The number of DGs located at distribution site, which uses renewable energy sources, forms a Micro-grid system. The problem of using DG with the utility is unplanned islanding. This paper has focused on passive islanding detection method (IDM) which is easy for implementation, cheaper and proficient. The suggested method tried to eradicate the disadvantage of passive conventional IDM. Low impedance grid always immersed small deviation of inverter output in the grid-connected mode, but whenever the grid is disconnected (i.e. in islanding condition) this stability effect of the grid is absent, which is picked up for islanding detection in the proposed method. In this paper, voltage ripple-based passive IDM is evaluated and tested under various operating conditions. The proposed method is easily working on condition like generated power and load power are the same and it was found that technique is robust, without NDZ and can detect islanding within 0.3 sec. Also the proposed method is able to differentiate islanding and non-islanding scenarios, which is helpful to stop unnecessary malfunctioning of DGs.

KEYWORD:

• Distributed generation (DG)
• Micro-grid system
• Non-detection zone (NDZ)
• Passive islanding method
• Renewable energy sources

Additional information

Notes on contributors

Rahul S. Somalwar

Rahul S Somalwar has completed his BE in electrical engineering in 2000 and completed ME in power electronics from RGPV Bhopal, MP India in 2009. He is having industrial experience as an executive engineer in Ballarpur Paper Industry (BILT) Pune. For the last 17 years he has been working as assistant professor in the Department of Electrical Engineering, DMIETR, Wardha and recently, he has completed his PhD from, RTMNU Nagpur on islanding in microgrid. His main area of interest is the application of power electronics in microgrid.

Diksha A. Shinde

Diksha A Shinde has completed her BE degree in electrical engineering in 2016 and MTech degree in integrated power system in 2018 from RTM Nagpur University at DMIETR, Wardha. Her area of interest is power system and micro-grids using renewable resources. Email: [email protected]

S.G. Kadwane

Sumant G Kadwane has done his BE in electrical engineering from Nagpur University at YCCE, ME in control systems from Pune University at Govt College of Engineering, Pune and PhD in engineering from Birla Institute of Technology, Mesra, India. He has worked as faculty in the Department of EEE at BIT, Mesra for 7 years and currently professor in the Department of Electrical Engineering at YCCE Nagpur, India teaching both UG and PG students. He has guided 3 PhD candidates and over 25 PG students with various control and DSP-based projects. He is Senior Member in IEEE and other professional societies like IETE. He is Editor in Chief for Journal for Research in Engineering and Applied Sciences published from central India. His areas of interest are control system design, power electronic converters and renewable energy. Email: [email protected]